National Dental Examining Board of Canada (NDEB) Practice Exam 2025 - Free NDEB Practice Questions and Study Guide

The genioglossus muscle is located anteriorly and can have an impact on the form of the anterior region during mandibular denture impression. The other muscles listed are either located posteriorly and would therefore not greatly affect the anterior form, or are not directly involved in the impression process. Mylohyoid, for example, forms the floor of the mouth and is not directly involved in the support or retention of the denture. Styloglossus and geniohyoid muscles are located posteriorly and would have minimal effect on the anterior region during impression. Therefore, B is the most appropriate answer.